An improved documentation can definitely help. I think Arvid suggested
something like this in the linked SURVEY thread and said that Kafka does
something similar.
The idea of different profiles sounds also promising.
I guess something like this deserves a dedicated effort and someone driving
it.
Cheers,
Till
On Wed, Sep 4, 2019 at 12:45 PM Chesnay Schepler <ches...@apache.org> wrote:
> The issue we seem to run into again and again is that we want to try to
> find a value that provides a good experience when trying out Flink, but
> also somewhat usable for production users.
> We should look into solutions for this; maybe having a "recommended"
> value in the docs would help sufficiently, or even configuration
> profiles for Flink "dev"/"production" which influence the default values.
>
> On 03/09/2019 11:41, Till Rohrmann wrote:
> > Hi everyone,
> >
> > I'd like to discuss changing the default restart delay for FixedDelay-
> and
> > FailureRateRestartStrategy to "1 s" [1].
> >
> > According to a user survey about the default value of the restart delay
> > [2], it turned out that the current default value of "0 s" is not
> optimal.
> > In practice Flink users tend to set it to a non-zero value (e.g. "10 s")
> in
> > order to prevent restart storms originating from overloaded external
> > systems.
> >
> > I would like to set the default restart delay of the
> > FixedDelayRestartStrategy ("restart-strategy.fixed-delay.delay") and of
> the
> > FailureRateRestartStrategy ("restart-strategy.failure-rate.delay") to "1
> > s". "1 s" should prevent restart storms originating from causes outside
> of
> > Flink (e.g. overloaded external systems) and still be fast enough to not
> > having a noticeable effect on most Flink deployments.
> >
> > However, this change will affect all users who currently rely on the
> > current default restart delay value ("0 s"). The plan is to add a release
> > note to make these users aware of this change when upgrading Flink.
> >
> > [1]
> >
> https://cwiki.apache.org/confluence/display/FLINK/FLIP-62%3A+Set+default+restart+delay+for+FixedDelay-+and+FailureRateRestartStrategy+to+1s
> > [2]
> >
> https://lists.apache.org/thread.html/107b15de6b8ac849610d99c4754715d2a8a2f32ddfe9f8da02af2ccc@%3Cdev.flink.apache.org%3E
> >
> > Cheers,
> > Till
> >
>
>
